So in August 2017 I was in a front-end accident and my front end was rebuilt at that time with all Kryptonite parts (centerlink, tie rods, pitman/idler arms and supports/frame gusset), the whole 9 yards.

So fast forward, I'm driving and start to hear power steering pump whining. I get home, thinking maybe hydroboost just needs to be bled. Power steering pump is completely dry and has puked all the fluid where the idler arm leaves the PS pump.

Next steps? I'm getting the shop that did the work to fix it through the prior insurance claim so I want everything done correctly. The seals were obviously blown out. New idler arm? New PS pump or is it likely OK after 20min running dry?

It puked the fluid from where?? The idler arm is nowhere near the PS pump. Do you mean the seal where the pitman arm attaches to the steering gear (steering box)? Though that shouldn't be exposed to power steering fluid unless the steering gear is internally hosed.

I would throw some cheap fluid in and see where it is leaking. It might be a hose or fitting that is squirting the fluid onto something else. It the part that leaked was something done by the shop for the accident repair, you could try and get them to fix it.

As for if the pump is OK or not, try it and see. It could go either way.

The welding would most likely just wipe out the pitman and idler arms sooner, the steering box is weak anyhow and if it took any kind of jolt it’s prolly junk. That being said, I blew the seals out on my LLY when I first got it, me not knowing what I was even working on just stuffed them back in with a hole punch and siliconed the dust cover in and it lasted until I wrecked it and broke the shaft off.

Pittman shaft seals are very common problems on our trucks. Have someone observe the pittman shaft arm/seal area while another person turns steering from lock to lock several times. You will be looking to see if the seal leaks at the end of the turn. If it leaks there, you will probably need a new steering box. If no leak, just replacing the seal will likely get the job done. I need to re-seal mine - just haven't taken it down to the garage to have the work done. Mine leaks a little, too. A minute or two with a pressure washer cleans it up for several months. I check the fluid level when I change oil.

The welding would most likely just wipe out the pitman and idler arms sooner, the steering box is weak anyhow and if it took any kind of jolt itís prolly junk. That being said, I blew the seals out on my LLY when I first got it, me not knowing what I was even working on just stuffed them back in with a hole punch and siliconed the dust cover in and it lasted until I wrecked it and broke the shaft off.